Internal-combustion engine.



F. X. BAGHLE & J. C. L. KREBS.

INTERNAL GOMBUSTION ENGINE.

` VV'ITNESSE l Mw F. X.. BAGHLE & J. C. L. KRE-BS.

INTERNAL GOMBUSTION ENGINE. APPLICATION FILED Nov. 11, 1909.

E. X. BAGELE & J.. EEE. KEEBS.

INTERNAL GOMBUSTION ENGINE. APPLICATION FILED NOV.11, 1909,.

PatentedLJuly 11, 1911.

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.-INrERNnL-comus'rren ENGINE.

Patented-July 11, .1911.

Applicationfiled Noveinbe'r 11,1 Q09. f Serial'No'. 527,560.

rasa-@hamamyemmf-., y-Beiit knownthat we', FRANKtX. BACHLE hereby decla-re the ,fellow yte be afull, 'cleama'nd exact desta-ji tionlr .such as lwill enable ot e'rs1-sk'.illed'in tlie'artv to `.vvhi ch. .it .appertains`t'o=malger aniluse' the' fsar'ne, #reference being had to then-accomthe invention,

.panying drawings, andtotheii 'ures' of ref-` ofl" t'hS Specification;v 1

- Our invention relates to rotary'- valves .for use in 'conjunction with multip1e` cylinder internal oombustion--`engines,and is particv.ulafrly applic'ableto engines offthe-two- 2O.

Icycle type; is .11' ot"'restricted"to' usej such. connection;

. The primary'A object of 'our' invention' isteim rovelnpon the 'apparatusgcove'red by?? United 'States Letir's Patent 'No.1 880,958

' f the; provision thefeinofmeans .for pumping a s'cavengin'gcliargeof-air into each cylinf.

der"y immediately priorv to `or during .the

eefth'e ,cylinder clearance of 'noncornbus working efliciencyfpfthe. engine.

apparent from the following description. l

.The operationyconstructlon and arraiigel,`

:ment .of the Vparts of O ilrl invention are fully' described inthe following specification, ,and ,While the' invention in .itsbroade'aspectl is..

susceptible of j embodiment in.- fnurne'rous cylinder tivo-"cycle engine with` portions off t'helcyl'indersjin'section'.and with a diagram- .frnfatieal longitudinal vsectional View cfg-an embodimento'four .valve associated there- ,r Wi th,{a`nd also Withthe' relative positions 0f the; cranks indicated below. the respective cylindersl Fig. 2 is' an end viewjof 'the same.'

Figs. 3,4, 5,-6 and'7 are vertical. .cross-sec- .grantedjointlyto usxen March A3, V1908,y by.

u'lnping of-. a'gas charge therein whereby-to.'y '30.'

u tible or..burned.gas fsi"'an'd thus increase the.

rtherobjects-kof our. invention vvill -be 01ans, a2 preferredy form of lthe'sa'r'ne is "illustrated 1`n the accernpanying-- drawings, in

117 '18, 19,720,21 Aand 22jare'cros's-secti0ns L21M-#2.1, and-22v-22'zin-Figi9'.' Referringto thedrawings, 1, 2,'.3 and 4 designate in v order from rightto-left-the sevre`ra l"cylinders ofjatwo-cycle'four-c linder vcompartn'rentfs.for each cylinder.l

with the-ports orducts 8 and 9 for gas and air,',re'spec t ively, leading' into the lowerperl tion of the combustion chamber 10- th ereof, Withthe exhaustport 11 leading fromsuch -"porti or duct'. leadingt 'the' the pumpingchambjer 13- thereo t'ons' are provided fat their. lower ends with enlargements 5" Which-operate-in the lower" 13, and are-'connected -byfpistonrodsto a v crank-shaftfin' the usual manner, v'vith. the

ofthe shaft and at-righi- -a'ngles'to the. opposing cranks of -cylinders Slanid 4.

' vided 'with a-'longitudinal cylindricalcharnber foireceiving therotary valve 15.- This housing',` for each -cylinder or'. separate unit .ofthe engine,'j'isprOvided With aport 16 the ports 17and 183-le'ading, respectively, to and fromthe interio'nof each crank-chamwhielirespectivelylead to and open communication between the ninterior of such gas-d istribpting' and -supply chambers, re

engine', 15 the piston- )pera'ting therein,and -6 thecrankcasa which is divlded vby parti-- tions 7 into"` separate vnon? connnunica-ting' Formed len'4 thwise on the Aside of the y cranlr-c'ase .61a jacent the ports 8, 9 and-12 is "a housingior valvefcase 111, which .is pros ber, and lports or passagewaysl), 20 and 21,".

chambers for convenience Inay be termed' l f see'tien ofthe Valve-taken on the line".8-I-8,

"in Fig .9'. '1 :Fig. 9'is -a 'side elevation ofthe Each cyl'nder is :provided in 'its-Walls`l f .chamber in-'the usual manner, and 'with the Vvpper endof'.

.' The pisenlarged ends/ofthe cylindersto coperat'e i. A therewith. to. form .the p'umpingfcharnbers v from the atmosphere to the -interiorthereof,

.a series of circularly arranged ports 27,

sh-own in the present instance as being disposedcentrally thereof which provide continuous communication between the supplychamber 23 and a pipe 28 leading to the usual carbureter through the. medium of the registering port 29 in the housing 14.

The ports 24 open communication with the supply-chamber 23 of the valve, Abeing the discharging ports from such chamber, and are so relatively arranged that each registers with the port 12-21lof its. cylinder on the ldown or out-going stroke of the associated piston, as shown in Fig. 5, to permit such piston to draw' a charge 'into the associated, pumping-chamber 13 from the carburete hrough the supply-chamber 23; the ports,l 5 open communication withthe distributing-chamber 22 and are so arranged that each registers with its port 12-21 on the up or compression stroke of the associated piston, as shown at the left of Fig. 1, to permit the charge in the pumping-chamber 130i such cylinder to be forced into the distrib ting-chamber 22; and the ports 26 open communication with the distributing-chamber of the valve, and are so arranged that each registers with the port 8-19 to the associated cylinder during the period that the same is uncovered by its piston, as shown in Fig. 4, to admit a charge to the combustion end of the cylinder.

A notch or channel 30 is provided in the side of the valve 15 for each'cylinder, and

is adapted on a rotation of the valve to successively open communication between the crank-.case port 18 and the cylinder port 9- 20 as shown in Fig. 3,' and the two ports 16 and 17 in the housing 14, as shown inl Fig. '6. The notches or channels 30 have no communication with either of the chambers 22, 23 of the valve and are so relatively arranged that each opens communication between its ports 18 and 9-20 when the associated piston is -uncovering its cylinder port 9--20 to admit a scavenging charge of air to the cylinder from the crank-chamber, and opens communication between theports 16 and 17 when the associated pist-on is near the limit of its up or compression stroke to l admit atmospheric-air to the crank-chamber;

The valve 15 is geared to rotate in unison lwith and at the same speed as the crankshaft by a train of gears 31, see Figs. 1 and esmas 2. These gears are preferably of the Aspiral type to facilitate an adjustment of the valve relative to the crank-shaft to admit a charge early or late as it may be desired to increase or reduce the speed of the engine VThe operation of our invention'is as follows2-Assu1ning that the-piston in No. 1 cylinder is near the end of its down or pumping stroke or just uncovering the-gas and air ports 8 vand '9 of suclrcylinder, the valve port 26` for such cylinder willibey open to.y the gas charging port 8-19 lto admit a charge which is being pumped into the distributing-chamber 22 ofV thevalve from the pumping-chambers .13 of Nos..2 and 4 cylinders on the upstrokes of their respective pistons, the valve port 25 of No. 2.cylinder being just about to closeto itscylinder port 12-21 whileV the valveport 25 of No. 4 cylinder is justopening fto its cylinder .port 12-21, as shown in aV 4 lfiiagrammatical way in Fig. 1, as a true-centralverticalsect-ion would not show all of thevalve ports asl indicated. It is thus seenfathat the charge compressed in No.y 1 cylinder comprises the residue or last portion 'p of the charge pumped from No. 2 cylinder and the m`ajor portion of the charge pumped from-No. 4 cylinder. In like'manner Nos.- 2, 3 and 4 cylinders receive the major portions of their charges from the pumping chambers 13 of Nos. 3, 1 and 2 cylinders, respectively, andthe residue of their charges from Nos. 1, 4 and 3, cylindersI respectively, the valveports 'of the several groups being properly arran ed. for such pnrpose.- At the same time o.,1 cylinder is taking its charge it is also Vreceiving a scavenging' charge of air from the associated crankchamber, due to the valve notch or channel 30 of such cylinder opening communication between the crank-chamber and the compression yend of the cylinder through the y medium of the Vports 18 and 9-20. The notches 30 are preferably so arranged relative to the ports 26 of the associated group that the air charge is admitted to the cylinder slightly in advance of the gas charge.- Itis thus apparent that the crank-case compression of each cylinder' is utilized to force the scavenging charges of air into its combustion chamber, instead of'forcing the gas charges thereto asv has heretofore been commonly the case. Gas is admitted to the com' pression end of each cylinder during the approximate movement of its crank between y -the points a b of its cycle, while the-scavenging charge of airis admitted thereto slightly in advance of and during the first -portion of such movement, see Figs. 3 and 4. A charge is also drawn into.` the pumpingchamber 13 of each cylinder on the downstroke ofi its piston due to` the, associated valve port 24 moving into register with its cylinder port 21--12 and opening communication -between such chamber and thevalve' supply-cha'mber Qyvhich is always incommuniction Witlrthe'carbureter. On-the upgas drawn. into the associated' pumpingmoved to lopen communication with the ports 1.6 and'' inthe valvehousing to `admit 'air atmosphere,suchlvair being .quickly drawn *into s'iich chamberduelt the,4 vacuum created' therein o 'nv ltllllpsfti'oke 'of the piston. v [This air is compressed inthe crank-chamber by caused toquickly rush'into the compres- 1.sion.encl 'of'the lassociated cylinderjvvhen vit islibra't'ed dueto Vits valve. notch B0 opening -.com1nunication .between said crank-chamber through the`ports` .18 and 94-20.

3Q burned or non-combustiblegas, a fresh gas valve distributingchamber 22 andffisfdi- Arected thereby to thev proper` cylinders, and

u' 'ently timed' relativel'to, the.. other groups to suit-thenumber-'of 'cylinders employed..

not limited to any specific-constructionor i cylinders each provided with a pumping valve-cha1nber22 to be distributed thereby t'o its cylinder is' compressed, the charge' in the associa-ted crankchamber.

, L-Having tlusvdescribed curinventiom-vvhatbustion chamber having 'comasstroke of each. piston," the associated valve porti 25- I noves into register with the-'p umpy ing-portllZ o f its cylinder to permit'the .chain-ber 13 to bev forced therefrom into` the.

theproper cylinders.- a pistoniis n ear. the Completion o f I .its up or compression 'stroke the` `associatedl valve notch 30 has .to the"a ssoc iat`ed crank-chamber. fro'ni' the on the downstroke' of the piston, andther'edf of the cylinderI It is, apparent from the foregoing thatfon `each down-stroke of a'piston,' the compression end of its cylinder is scavenged-of all charge is pumped, therein by one or more-Tof the other pistons of 'the' engine, and acharge is dra'Wninto'thepumping-chamber r13 from the carbu'ieter;4 'Als'othat on each upstrolte of a. piston the chargein the upperend of the- 'pumping-chamber'13 is forced .into the' the 'scavenging charge of ain is0 admittedto.'

It'is evident that the invention may "be employed. in' connection with an;`eng ;n en comlprising two ,or more cylinders', as the cycle 'of bperationsfof each'groupof-va1ve ports- Will be ,approximately thefsame but vdiffer-f "We wishit understood 'that 'our invention arrangement" of. parts and location 'andfsi'z'e Xcent insofar .as such limitations yare.'specified.inthe claims.

'we claimas new and desireto secure by Letters Patent,is,- y 1..1 A muaipie @1ylinden engine having its chamber, a combustion chamber l and an air compressing chamber, the pumping chamber having one pc 1`t leading thereto and th coin,i

two' portszleading thereto, one of'sfufch t-Wo'portslleading from the' associated 'air fcompgessing Ichamber', a.

'- scribed ber,

ing chamber and from it chamber of1 anothercylinder; the ad missi'c`mi.

and a "combustion-'.Chamber,

"fwith, a rotary .valve operative passage 4of ga cylinders i each control the admission@ cf. air to each cylinder through' its 'air and means. for voperati-n Aa combustion chamber;

toadmit gasto and fro'rnthe pum-pin grcham-y i bers and then to' the combustion chambers' th'roigh one of thefports ofeach combustion."

chamber, and '..to admit.: scavenglng Vcharges fofa'i'rto each combustion chamber 4from its compression chamber, substantially'. y de-i 2; 'A multiple cylinder-two-c cle eng-'ine having its cylinderseachprovided with a? combustion chamber,

a gaszpu'rnpingchamand van` air compressingcham'be'r, vaj

single nrotary valve disposed at a f sidev ofthe 'engine and havinga gas-supply chamber and a gas-distributing chamber,'and having means -for controlling the .admission'-ofair tothe compression chambers'L .said -ien'gine having ports provided in the walls ofy said chambers Awhich coperate with the va l've"f-to control the. admission fvof air to eachc'ompression chamber andthe" passage ef a scavenging "charge-I cfs-sairfrom'.

:each compression :chamber to the associated combustion chamber at predetermine 'points inv a cycle'ofsoperations' of the 'ma`c l '1'ine ,`jl and -means'for operating'the` valve.` l

- 3.- A 1nultiplecylinder engine having cylinders each .provided with la. pumping the pumping chambers 'each having one port communicating therewitlil and `the' combustion vchambers each havingtwo ports communicating thereof., the combustin-'chambers throughone of "its portsz afnd means controlled :by said valve )for admitting scavenging charges of. air-to' the conibust-ioncliambers through the other ports thereof, substantially'as describedJ- 4.."A 1nultip le` cylinder engine havingits and combust each having a. gas port communicating there to control the' s to -andfrom each "pumping cha-mberf'througli itsport andthen tononel provided 'yvith fa 'pumping ion chamber; said chambers-- Witl 1, and` the combustion c hanibers-each" having an a'1riport,.a rotaryvalve having a' series of .ports 1n communication with .i1--

source" of fuel supplyand adapted tosucfr cessivelyfregister with the 'd-ilerent' pumpingv chamberrportsfas the val-ve isf/rotated. and

'also having a .distribting chamber provided '.'with a A double series of ports', ongseriesnof with' the. pumping 'chamber' ports'. and. the other With -the^ combustion" which registers chamber gas 'ports vvvhen the valve is rotated, saidvalv'ealso having portions chanheled'toa scavenging-charge communicating therewith, a rotary valve forming a distributing chamber and having a series of ports for each cylinder operative to open communication between'the pumping chamber and a fuel supply, the pumping'chamber and said distributing chamber,

' and the distributing chamber and the combustionchamber at predetermined points in a rotation of the valve, said valve also having passages which permit the intermittent admission of scavenging air 'to each combustion chamber through its air port,

I and'means for operating the valve.-

6. A multiple cylinder engine haying its cylinders each provided With a pumping and a combustion chamber, the former having la gas port, and the latter having a gas port andan air port, a rotary valve Iforming a distributing chamber and having a series of ports Ifor each cylinder operativaY at predetermined points in the rotation of the valve to open communication between the pumping chamber and a vsource of fuel supply between the pumping chamber and said distributing chamber, and between the distributing chamber and the combustion chamber, said valve `being also -provided with means to control the admission of scavengingair to each combustion chamber through its air port at a predetermined point in .the

. rotation of the valve, means for forcing said air charge into the combustion chamber, and

` means 'for operating the valve.v

fao

cylinders each provided with a pumping and a combustion chamber, ports leading to said chambers, a rotary'valve coperating with said ports to control the admission of gas to and from the pumping chamberand to the combustion chamber of each cylinder, a crank case forming a crank chamber foreach `cylinder, said crank chamber and-the associated combustion chamber having a coinmunicating'passage and said crank chamber having a passage in communication with the y atmosphere, said valve being associated with such passages and having means acting to control the admission of air to each crank chamber. and the discharge of air from each crank chamber'to its combustion chamber,

substantially as described.

8. A multiple cylinder engine having its cylinders each provided with a pumping and a combustion chamber and ports leading to such chambers, air pumping means in communication ,with the combustion chambers,

a rotary valve for controlling thepassage of gaslthrough'said ports to and from the pumping chambers vand toy the jcombustion chambers and the admission of a scavenging chargeof air to each combustion chamber from said pumpingnieans,-` and means for@l operating said valve.

9. A multiplecylinder engine having its cylinders each provided with a pumping and a combustion chamber, a gas port for each of such chambers and an air port for each combustion chamber, a rotary valve for controlling the passage of gas to the pumping chambers through their gas ports, the passage of gas from the pumping chambers to the combustion chambers through the gas ports of such chambers, and the passage of air through said'air ports to the combustion chambers, and means for rotating the valve.

- 10. A multiple cylinder two cycle engine having its cylinders each provided with a combustion chamber having two ports leading thereto and with an air compressing chamber having an exit port, a single valve for controlling the admission of gas through one port of each combustion chamber and the admission of air through the other port of each combustion chamber from the assol ciated compression chamber at predetermined intervals, and means for operating the valve. ,f' 11. A multiple cylinder two cycle engine having lits cylinders each provided with a combustion chamber and a plurality of ports leading thereto, :air pumping means in communication with 'each chamber through one of its polrts, gas supply means in communication witl'e'ach 'chamber through the other of its ports, a single valve coperating with said ports to control the admission of gas and air to the several combustion chambers at predetermined intervals, and means for v operating the valve. 7 A multiple cylinder engine having its- 12. A multiple cylinder engine having its cylinders each provided with a gas pumping and a combustion chamber each having a port in communication therewith and each combustion chamber having communication with a source of air supply, a rotary member i adapted to coperate with said ports at difcombustion chamber having a port in communication with a source of air supply, a rotary valve associated with the cylinders and having a @as supply chamber in communication wit a source of gas supply and ai gas distributing chamber, and adapted when rotated to successively open communication between the pumping chambers and said supply chamber, also to successively open communication through said distributing chamber between the pumping and combastion chambers, the communicating pump- 2 5 member.

15. In a mult-iple cylinder engine, the

samen and combustion chambers being disposed in different cylinders,-' and to admit air to the combustion'chamber of each cylinder to scavenge the same, "and means for rotating Ysuch valve, substantially as described` 14. In a multiple cylinder two cycle en-v gine, the combination with the several cylinders each having a pumping and a' combustion chamber thereinand ports 'leading thereto, vof'a. member having a gas supply chamber provided with ports for intermittently registering with the pumping chamber ports andv al gas` distributing chamber having ports for' intermittently 'registering with the pumping'chamber ports and for intermittently registering with the combustion chamber ports when said member is moved, said member-also having means for controlling the admission of scavenging air to the Acombustion chamber of each cylinder through one of its ports, a source of gas supiply., s'a1d supply chamber having communication. intermediate its ends with said source 'of gas supply, and means for moving said combination with the several cylinders each y having a pumping anda combustion chamhaving ports communicating therewith, of-

ber therein and air compressing means assoclated therewlth said chambers and means a rotary member having a gas supply chamber, and a gas dlstribut-ing chamber, a source of gassupply in lateral communication With the supply chamber intermediate its ends, said member having a series of ports for each cylinder which operate to open communication between said' supply and pumping chambers, said pumplngand distributing chambers,.sa1d compressing means and -combustion chambers,and said distributing A and combustion chambers at predetermined points 1n a rotation of said member,'and

means for rotating said member. t

16'. In a multiple vcylinder engine, the

.combination with the several cylinderseach having a pumping and a combustion chamber, and air suction and compressing means With ports leading to said pumping chamber and means and aplurality of ports leading to the combustion chamber, of arotary valve having a supply chamber in'lateral com-- munication with Aa source of gas supply and ing chambers through the ports leadingthereto, said valve also having a distributing from which the .charges of t-he 'several cylinders are successively drawn to the pumpchamber located within the supply chamber and into which the 'charges are forced from the pumping chambers through their ports and then delivered to predetermined ones of the combustion chambers through less than the' full number of ports leading thereto, and having means for admitting air to the compressing means and from the compressing means to the associated combustion chambers through a portion of the ports leading to such chambers at-predetermined points in a cycle of operation, and means for rotating the valve.

17.'l'n a multiple cylinder engine, Athe combination with the several cylinders each having a pumping chamber with at least one`port leading thereto and a combustion chamber and with a plurality of ports leading thereto, of a valve member having a gas supply chamber incommunication with a source of gas supply and from which the charges of the several cylinders are successively drawn into the pumping chambers thereof through the pumping chamber ports, said member y also having a distributing chamber into which the charges are successively forced from the pumping chambers of the cylinders through the pumping chamber ports and delivered to the combustion chambers of cylinders other than those forcing charges into said member through' chambers, separate air and gas ports leading to each combustion-chamber, tlieformer from the associated compression-chamber, a gas port leading to each pumping chamber, a rotary valve for controlling the admission of gas to and from the pumping chambers'and to the combustion-chambers and the admission of air from the compression-chambers to the combustion-chambers at predetermined intervals, and means for operating the valve. V

19. In an internal combustion engine, the combination of a plurality of working cylf inders, a plurality of pump cylinders, a plurality of crank chambers, a valve chamber common to all of said cylinders and' said crank chambers and having passages lead-iv ing to each of said cylinders and said crank chambers, and rotary means arranged in said valve chamber for, controlling all of said passages. f

20. In an internal combustion engine, the combination of a plurality of working cylinders, a plurality of pump cylinders, a plurality of crank chambers, a valve chamber common to all of said cylinders and said crank chambers and having passages leading to each of said cylinders and said crank chambers, and a single rotary valve arranged signed our names to this specification in the bei` and the ohher as a gas distributing Witnesses:

in said chamber for controlling al1 of .said presence yof two subscribin witnesses. passages, said valve having inner and outer FRANK BACI-ILE. chambers one serving as a gas supply cham- JOHN C. L. KREBS.

chamber. H. G. GIBBoNs,

In testimony whereof, We have hereunto JOHN C. LETsoN.

Copies of this patent may be obtained for ve cents each. bj addressing the Commissioner of Iatents,

' Washington, D. C. 

